number system formulas - Wikitechy https://www.wikitechy.com/interview-questions/tag/number-system-formulas/ Interview Questions Mon, 20 Sep 2021 10:21:09 +0000 en-US hourly 1 https://wordpress.org/?v=6.9 https://www.wikitechy.com/interview-questions/wp-content/uploads/2025/10/cropped-wikitechy-icon-32x32.png number system formulas - Wikitechy https://www.wikitechy.com/interview-questions/tag/number-system-formulas/ 32 32 The pulse rate of a person is 15 beats in 10 seconds. At this rate, what will be pulse rate of the person per minute ? https://www.wikitechy.com/interview-questions/numbers/the-pulse-rate-of-a-person-is-15-beats-in-10-seconds-at-this-rate-what-will-be-pulse-rate-of-the-person-per-minute/ https://www.wikitechy.com/interview-questions/numbers/the-pulse-rate-of-a-person-is-15-beats-in-10-seconds-at-this-rate-what-will-be-pulse-rate-of-the-person-per-minute/#respond Tue, 17 Aug 2021 19:40:59 +0000 https://www.wikitechy.com/interview-questions/?p=1905

The pulse rate of a person is 15 beats in 10 seconds. At this rate, what will be pulse rate of the person per minute?

A. Data insufficient

B. 100 beats per minute

C. 90 beats per minute

D. 150 beats per minute

Answer : C. 90 beats per minute

Explanation:

A person pulse rate in 10 seconds = 15.
A person pulse rate of one second 15/10 = 1.5.
A person pulse rate at one minute is 60 * 1.5 = 90.
A person pulse rate is 90 beats per minute.

]]> https://www.wikitechy.com/interview-questions/numbers/the-pulse-rate-of-a-person-is-15-beats-in-10-seconds-at-this-rate-what-will-be-pulse-rate-of-the-person-per-minute/feed/ 0 The average of 7 numbers is 60. The average of the first three numbers is 50, while the average of the last three is 70. What must be the remaining number ? https://www.wikitechy.com/interview-questions/numbers/the-average-of-7-numbers-is-60-the-average-of-the-first-three-numbers-is-50-while-the-average-of-the-last-three-is-70-what-must-be-the-remaining-number/ https://www.wikitechy.com/interview-questions/numbers/the-average-of-7-numbers-is-60-the-average-of-the-first-three-numbers-is-50-while-the-average-of-the-last-three-is-70-what-must-be-the-remaining-number/#respond Tue, 17 Aug 2021 19:38:00 +0000 https://www.wikitechy.com/interview-questions/?p=1901

The average of 7 numbers is 60. The average of the first three numbers is 50, while the average of the last three is 70. What must be the remaining number ?

A. 75

B. 60

C. 65

D. 55

Answer : B. 60

Explanation:

The sum of all the seven numbers = 60 * 7 = 420
The sum of the first three = 50 * 3 = 150
The sum of the last three = 70 * 3 = 210
Remaining Number = 420 – (210 + 150) = 60

]]> https://www.wikitechy.com/interview-questions/numbers/the-average-of-7-numbers-is-60-the-average-of-the-first-three-numbers-is-50-while-the-average-of-the-last-three-is-70-what-must-be-the-remaining-number/feed/ 0 Which of the following numbers is not divisible by 14 ? https://www.wikitechy.com/interview-questions/numbers/which-of-the-following-numbers-is-not-divisible-by-14/ https://www.wikitechy.com/interview-questions/numbers/which-of-the-following-numbers-is-not-divisible-by-14/#respond Tue, 17 Aug 2021 19:36:34 +0000 https://www.wikitechy.com/interview-questions/?p=1900

Which of the following numbers is not divisible by 14 ?

A. 3542

B. 2086

C. 1998

D. 2996

Answer : C. 1998

Explanation:

3542 / 14 = 253
2086 / 14 = 149
1998 / 14 = 142.714
2996 / 14 = 214
Option C is not divisible by 14

]]> https://www.wikitechy.com/interview-questions/numbers/which-of-the-following-numbers-is-not-divisible-by-14/feed/ 0 By what number should be 86700 divided to make it a perfect square ? https://www.wikitechy.com/interview-questions/numbers/by-what-number-should-be-86700-divided-to-make-it-a-perfect-square/ https://www.wikitechy.com/interview-questions/numbers/by-what-number-should-be-86700-divided-to-make-it-a-perfect-square/#respond Tue, 17 Aug 2021 19:32:58 +0000 https://www.wikitechy.com/interview-questions/?p=1898

By what number should be 86700 divided to make it a perfect square ?

A. 3

B. 2

C. 5

D. 4

Answer : A. 3

Explanation :

Divide 86700 by 3 = 28900
The square root of 28900 = √28900
= 170 is the perfect square

]]> https://www.wikitechy.com/interview-questions/numbers/by-what-number-should-be-86700-divided-to-make-it-a-perfect-square/feed/ 0 If the number 7×86038 is exactly divisible by 11, then the smallest whole number in place of x ? https://www.wikitechy.com/interview-questions/numbers/if-the-number-7x86038-is-exactly-divisible-by-11-then-the-smallest-whole-number-in-place-of-x/ https://www.wikitechy.com/interview-questions/numbers/if-the-number-7x86038-is-exactly-divisible-by-11-then-the-smallest-whole-number-in-place-of-x/#respond Tue, 17 Aug 2021 19:22:38 +0000 https://www.wikitechy.com/interview-questions/?p=1895

If the number 7×86038 is exactly divisible by 11, then the smallest whole number in place of x ?

A. 1

B. 2

C. 3

D. 4

Answer : C. 3

Explanation:

The given number = 7×86038
Sum of the odd places = 8 + 0 + 8 + 7 = 23
Sum of the even places = 3 + 6 + x
(Sum of the odd places) – (Sum of even places) = Number (exactly divisible by 11)
23 – (9 + x) = divisible by 11
14 – x = divisible by 11.
X must be 3, to make given number divisible by 11.

]]> https://www.wikitechy.com/interview-questions/numbers/if-the-number-7x86038-is-exactly-divisible-by-11-then-the-smallest-whole-number-in-place-of-x/feed/ 0